161606101566615 has 8 divisors (see below), whose sum is σ = 258569762506608. Its totient is φ = 86189920835520.

The previous prime is 161606101566589. The next prime is 161606101566661. The reversal of 161606101566615 is 516665101606161.

161606101566615 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161606101566615 - 2¹⁰ = 161606101565591 is a prime.

It is a super-2 number, since 2×161606101566615² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5386870052206 + ... + 5386870052235.

It is an arithmetic number, because the mean of its divisors is an integer number (32321220313326).

Almost surely, 2^{161606101566615} is an apocalyptic number.

161606101566615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161606101566615 is a deficient number, since it is larger than the sum of its proper divisors (96963660939993).

161606101566615 is a wasteful number, since it uses less digits than its factorization.

161606101566615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10773740104449.

The product of its (nonzero) digits is 1166400, while the sum is 51.

The spelling of 161606101566615 in words is "one hundred sixty-one trillion, six hundred six billion, one hundred one million, five hundred sixty-six thousand, six hundred fifteen".